baber/WOPTO huggingface dataset:
Patent GB-1178488-A (GB)
Title: Improvements in Solid State Phase Shifter Circuits, utilised in particular in the Field of Ultra High Frequencies and Microwave Frequencies
IPC: H01P1/185
Filed: 1967-03-31
Abstract: 1,178,488. Phase-shifters. COMPAGNIE FRANCAISE THOMSON HOUSTONHOTCHKISS BRANDT. 31 March, 1967 [31 March, 1966], No. 14966/67. Heading H1W. A phase-shift of 0 or # in a microwave signal is obtained by variation in the impedance of a semi-conductor device (or devices) connected in series with the central conductor of a transmission line in the vicinity of a short-circuit. As shown, two such devices 341, 342, e.g. varactor diodes, are connected as shown in series with the central conductor 31, 312, 311 of a coaxial line which is short-circuited at 33. A bias signal, which alternates between the two extreme bias voltages of the diodes, is applied through leads 361, 362. Where the bias signal has a relatively high frequency, it is applied through appropriate matching quarterwave stubs. The inductance L of the sections 311, 312 is such that L = CZ 0  where C is the capacitance of the diodes in the back-biased condition and Z 0  is the characteristic impedance of the line. If, in addition, 1/#C # Z 0  and #L ½ Z 0 , the microwave signal in line 31, 32 suffers, upon reflection, phase-shifts of 0 and # respectively in the two opposite conductive states of the diode. A tri-plate line may be used. The diode or diodes may be directly connected to the short-circuit without interposition of the stub 311 if C is small enough. The phase-shift device may be connected to one of the ports of a three-port circulator, the other two ports furnishing input and output respectively. Alternatively, a phaseshifter may be connected to each of the conjugate ports of a 3db. directional coupler of which the other two port form the input and output respectively. A ring hybrid coupler -may be substituted for the 3db. coupler but, in this case, the diodes in the two phaseshifters must be controlled in phase opposition. To avoid this condition, the electrical lengths between the phase-shifters and the corresponding ports of the ring hybrid may be arranged to differ by one quarter-wavelength at the microwave frequency.
Patent GB-1391542-A (GB)
Title: Apparatus and process for producing torque controlled voluminous set yarn and yarn and fabric produced thereby
IPC: D02G1/02
Filed: 1972-03-30
Abstract: 1391542 Modified torque yarn LEESONA CORP and LEX TEX LTD 30 March 1972 [10 May 1971] 14980/72 Headings D1F and DID A method of modifying torque in a thermoplastic yarn comprises passing a yarn through a first heating zone and a first cooling zone, false twisting the yarn in said zones and overfeeding the torque stretch yarn within a range of 5% to 25% through a second heated zone and a second cooling zone and reverse twisting the yarn in said zones to an extent that the twist per unit length is less than 25% of the twist per unit length employed in the torque stretch yarn producing process; the residual torque thus being reduced. The process is preferably performed continuously on apparatus comprising in sequence a yarn feed bobbin 10, a feed roller 20 associated with a first heater 30, a first false twist means 40 e.g. a spindle, a second feed roller 50 overfeeding the yarn Y to a second heater 60, a second false twist means 80, a third feed roller 90 and a take-up bobbin 100. The over feed to the second heater 60 is maintained within the range 5-25%. The false twist means 80 preferably comprises a set of nip rolls 81A mounted for rotation about their axis in a direction to advance the yarn fed between them, the rollers 81A being mounted on a rotatable cage 82. The cage 82 is rotatably mounted on a fixed member 87 carrying a stationary bevel gear 86A which meshes with bevel gears 85A, 85B mounted in the cage 82. Gear wheels 84A, 84B are mounted on the same shafts as the bevel gears 85A, 85B are rotated by them, this rotation causing rotation of gear wheels 83A to rotate the rollers 81A.
Patent GB-195889-A (GB)
Title: An instrument for fringe knotting of carpets, or other fabrics
IPC: D04G5/00
Filed: 1922-05-29
Abstract: 195,889. Mackay, D. R. May 29, 1922. Knot-tying devices. - A device for knotting the fringes formed by the loose ends of warp and weft threads of carpets or other fabrics comprises a hook 3 over the shank 1 of which slides a casing 4. Bundles of loose thread-ends are wound round the end of the casing and under the hook, as in Fig 9, the casing is moved so as to clamp the free ends of thread between itself and the hook, and then the looped part of the threads is slipped off over the hook and the free ends drawn through the loop. The casing may have secured therein frictionally a split sleeve 5, with a longitudinal curved lip 6 of trough shape, a recese 7 and a shoulder 8 so as to form a narrowing space into which the threads, are gathered. The sleeve may be formed of various dimensions to suit different kinds of work, or may be dispensed with. The hook is rigidly mounted on a handle 2, and the casing is actuated by a finger piece 10 against a spring 12 surrounding a guide rod 11.
Patent GB-257999-A (GB)
Title: Improvements in thermionic valves
IPC: H01J19/28
Filed: 1925-06-09
Abstract: 257,999. General Electric Co., Ltd., Bartlett, A. C., Gossling, B. S., and Le Rossignol, R. June 9, 1925. Vacuum tubes.-An anode forming part of the envelope is arranged to :give a vacuous space of annular form. As shown in Fig. 2, the anode consists of an outer cylinder 4a, detachably sealed at 5 to a metal part 2, - and a re-entrant cylinder 4b, closed at the inner end. A cathode, consisting of pairs of filaments 30, 31 forming a cylindrical cage, and a grid, in the form of two mesh cylinders 42, 46, are mounted in the annular space between the anode cylinders. The part 2 is sealed to a glass portion 1, Fig. 1, of the envelope. The filaments are mounted in pairs on bridge-pieces 33 secured by insulated hooks 34 to a metal ring 36, springs 37 being provided for tensioning the filaments. At the other end the filaments are mounted by means of rods on radial lugs extending from plates 10, 11, so that the loops formed by the pairs of filaments are connected in parallel. The ring 36 is spaced from the plate 11 by rods 38. The plates 10, 11 have tubular conductors 8, 9 respectively, each with an internal tube 8a, 9a, providing space for the circulation of a cooling fluid. The space between the tubes 8, 8a is divided into two parts by longitudinal strips (not shown). The plate 11 is spaced from the plate 10 by an insulator 12, and the tube 9 is insulated by a glass ring 17. A cap 6, on which the conductors 8, 9 are mounted, is sealed to the glass envelope 1. The grids are secured to rings 40, 41 supported by rods 43 from flanges 26, 27 on a collar 25. A tubular conductor 23, connected with the collar, is supported from the cap by a tubular insulator 22. The glass to metal joints are protected by shields 28, 29. The valve may be dismantled by opening the joint 5. When the diameter of the filament-grid system is greater than that of the glass envelope the anode may be in two parts.
Patent GB-420355-A (GB)
Title: Improvements in or relating to reels for winding metal strips into coils
IPC: H01F41/061
Filed: 1934-05-18
Abstract: 420,355. Winding metal strip. SCHLOEMANN AKT.-GES., 13, Freiherr vom Steinstrasse, D³sseldorf, Germany. May 18, 1934, No. 15027. Convention date, Oct. 13, 1933. [Class 83 (iv)] Strip material is wound into coils between rolls a each driven by an electromotor rand slidably mounted in radial guides against the urge of a weighted lever g, and a loosely mounted centre roller e. The rolls are carried in a frame i withdrawable by power means at the completion of the winding to allow the coil to fall down a shoot from which it is removed by a conveyer. The strip is fed through pivoted guides c, d. To assist the winding, arcuate guiding plates x are projected over the roll e and are withdrawn by an electromotor z and screw y when the initial turn has been wound.
Patent GB-593319-A (GB)
Title: Readily disconnectable clutch for transmitting rotary movement
IPC: F16D11/10
Filed: 1945-06-13
Abstract: 593,319. Claw clutches; securing members on shafts. BENDIX AVIATION CORPORATION. June 13, 1945, No. 15031. Convention date, May 10, 1944. [Class 80(ii)] [Also in Group XXXIII] In a clutch of the kind having pins moved axially by resilient means for engagement, the pins are disengaged manually through an axially disposed flexible connection and are held in the disengaged position by spring - biassed latching levers manually operable to release the pins for engagement. As shown applied to a servomotor drive for an aircraft control surface, a fourarmed spider 36, Fig. 4, has two arms 39, 40 carrying pins 41 engaging holes 44, 46, Fig. 6, in the driving and driven members 10, 19 of the clutch. The spider is biassed towards engagement by a spring 57, Fig. 5, and is disengaged by pulling on a flexible tension member 56 passing through the end cover of a casing 14 attached to the member 10. When disengaged, the spider is retained by its remaining arms 37, 38 which co-act with steps on inwardly spring- biased pivoted axial hinges 23, mounted on the driving member, whose outer ends project through slots in the end cover for manual tripping. The driving member 10 is splined on the servomotor shaft (not shown), being located thereon by a splined locking plate 15 unsymmetrically bedded down by a screw 16 with or without a spacing bolt 17. The member 19 carries a pulley 20 on which the control surface operating cable is wound.
Patent GB-989118-A (GB)
Title: Semiconductor circuit elements
IPC: H01L29/00
Filed: 1962-04-18
Abstract: 989,118. Semi-conductor devices. INTERNATIONAL BUSINESS MACHINES CORPORATION. April 18, 1962 [April 20, 1961], No. 15036/62. Heading H1K. [Also in Division H3] A circuit element has a body with two or more adjoining semi-conductive portions, the two adjoining portions, or an adjoining two of the portions, being of different basic semiconductor material; the body also has a region of semi-conductive material which adjoins each of the portions of the body and forms a rectifying junction with at least one of them. The embodiment shown in Fig. 2 has an intrinsic portion 3 of GaAs (pn 5 x 10<SP>6</SP> ohm.cms.) on which an N+ Ge portion 2 is epitaxially deposited. A large area ohmic contact 5 is provided on the lower face of the composite body. To the upper surface of the body is alloyed a pellet 4 of a Ga/Sn alloy. The Ga converts the recrystallized Ge region 6 to P+ conductivity, thus producing a Ge tunnel diode supported by intrinsic GaAs (except for a small region 7 converted to N+ conductivity by Sn from the alloy). A portion 8 of the N+ Ge portion may be etched away, as shown, to reduce the junction area of the diode and obtain a correspondingly low capacitance. In the embodiment of Fig. 3 a composite body having successive portions 2, 4, 3 of P+ GaAs, intrinsic GaAs, and N + Ge has a broad area ohmic contact 8 provided on one face and on its opposite face has an epitaxially deposited layer 5 of N+ Ge to which an ohmic contact 9 is attached. The junction between portion 2 and layer 5 may be reduced by etching if desired. This construction provides an oscillator in which the equivalent circuit contains a capacitance and shunt negative resistance associated with the heterojunction tunnel diode formed by portion 2 and layer 5, positive resistance associated with portion 3, and inductance, which is mainly associated with layer 5. The embodiment of Fig. 4 (not shown) is similar to that of Fig. 3, but instead N+ Ge portion 3 it has a portion of P+ Ge. This produces a hetero-junction tunnel diode in parallel with a homo-junction tunnel diode, thus providing a device in which one diode is designed to act as a load on the other which operates as a class C oscillator at low power levels. Specification 886,393 is referred to.
Patent GB-1463503-A (GB)
Title: Access equipment
IPC: B63B9/00
Filed: 1974-04-04
Abstract: 1463503 Elevator; luffing arm apparatus SIMON ENG DUDLEY Ltd 14 Oct 1974 [27 Oct 1973 4 April 1974] 50281/73 and 15058/74 Headings B8L and B8H [Also in Division E1] Access equipment is mounted to enable access to the interior surfaces of a structure bounding a large space such as the cargo section of a large crude carrier, the access equipment comprising a pole 10 which is clamped at or adjacent its upper end by a special fitting 12 positioned on the topside of the carrier deck around a hole H, the lower end of the pole 10 being located in a fitting 11 which prevents lateral movement of the pole, but does not support the pole 10 against downward movement so that the pole 10 is maintained in a state of tension by virtue of its own weight. A pair of carriages 13 is slidable along the pole 10, each carriage 13 having a telescopic boom 19 pivotally mounted thereon by means of plates 22, 23, the outer end of each boom 19 pivotally supporting a platform or cage 26. The carriages 13 and thus the booms 19 are movable vertically along the pole by means of cables 16 attached to respective winches 17 on a derrick 18, each boom 19 being luffable in a vertical plane by means of a respective winch 29 connected by a cable 30 to the outer end of the boom. The booms 19 each comprise an upper and lower telescopic arm 20, 21 and each platform 26 comprises a central section (27) to which further sections may be attached, Fig. 2 (not shown). The pole 10 is made up from a number of pole sections (50), each section (50) consisting of two halves (51) bolted together, Fig. 5 (not shown).
Patent GB-1367272-A (GB)
Title: Electric commutator motors
IPC: H02P3/06
Filed: 1973-03-29
Abstract: 1367272 Control of A.C. motors; control of D.C. motors STANDARD TELEPHONES & CABLES Ltd 29 March 1973 15098/73 Heading H2J A commutator motor having a series or separately excited stator field winding is stopped rapidly at switch-off by connecting in parallel with the field winding the series combination of a further stator winding and means to isolate the further winding from the field winding while power is supplied to the motor and to connect the further winding with the field winding at power switch-off, so that the further winding generates a flux which opposes the flux generated by the field winding. In the case of the D.C. motor shown in the Figure, the stator winding is bifilar and has portions W1, W2 isolated by a diode D which prevents current flow in winding W1 when power supply switch S is closed to energize winding W2. When switch S is opened a current I flows through both windings W1, W2 to generate opposing fluxes to stop the motor. The field winding of a series motor may be similarly controlled by connecting it in parallel with the series combination of a further winding and a diode. For an A.C. motor, the diode is replaced by a controlled switch such as a thyristor which is open when the power supply switch is closed and closed when the supply is switched off.
Patent GB-618519-A (GB)
Title: Improvements in and relating to pulse radar systems
IPC: G01S13/76
Filed: 1946-05-20
Abstract: 618,519. Radiolocation. BROWN, R. H. May 20, 1946, No. 15217. [Classes 40 (v) and 40 (vii)] A pulse radar system consists of an interrogator having a main transmitter and an auxiliary transmitter and, at a remote station, a transponder arranged to respond to the interrogating signals from the main transmitter and to transmit reply signals, a first receiver for receiving the interrogating signals and controlling the reply signal transmitter, an auxiliary receiver for receiving auxiliary signals from the auxiliary transmitter, and control means for controlling the sensitivity of the first receiver in dependence on signals derived from the auxiliary receiver. In an interrogator and responder system (Figs. 1 and 2), the interrogator comprises a primary pulse radar system consisting of a transmitter 1 and receiver 2 connected to a common antenna 3 which may be directional and rotated in azimuth together with a second auxiliary system consisting of transmitter 4 and receiver 5 connected to a further antenna system 6. Reflected echoes of the primary system fed to receiver 2 may be displayed on a plan position indicator and for this purpose the directivity of antenna 3 may be sharp. Antenna 6 may be omnidirectional or a simple directive system rotating with antenna 3; from it are radiated pulses of a different carrier frequency arranged to preceed the pulses of the primary system by a variable time delay t1. For this purpose the auxiliary pulses from transmitter 4 are passed through a delay device 7 and then used to trigger transmitter 1. Receiver 5 receives signals re-radiated by the responder and its output may be applied to the indicator fed by receiver 2. At the responder, the auxiliary pulses are received on antenna 11 and by receiver 9, the output of which operates circuit 13 controlling the gain of receiver 8. The receipt of an auxiliary pulse causes the gain of receiver 8 to rise instantaneously to a finite high value and then to fall, preferably linearly, to zero in a time less than the pulse recurrence frequency of the transmitter 1, but larger than the maximum value of delay t1. The sensitivity of receiver 8 to pulses radiated from transmitter 1 is thus controlled by variable delay device 7 at the interrogator; if receiver 8 is sufficiently sensitive responder transmitter 12 returns a predetermined coded reply to interrogator receiver 5. Fig. 3 shows (a) pulses from transmitter 1 and (b) pulses from transmitter 4, which may be arranged to radiate at a submultiple of the main pulse recurrence frequency, these auxiliary pulses precede the corresponding pulses at (a) by a time t1. At 3c is indicated the sensitivity of the receiver 8 at the responder.
Patent GB-1427485-A (GB)
Title: Process for production of a synthetic paper improved against dusting trouble
IPC: C08J7/043
Filed: 1974-04-05
Abstract: 1427485 Synthetic paper OJI YUKA GOSEISHI KK 5 April 1974 [7 April 1973] 15225/ 74 Heading B2E A process for producing opaque synthetic paper improved against dustng trouble when used in printing machines, comprises coating the surface of a sheet comprising plastics material incorporating filler particles having a size of 0.5 to 30Á or a laminate of the sheet with at least one further plastcis layer, with an aqueous dispersion or solution of a dry-extensible polymeric material; drying the coated sheet; and stretching to sheet in at least one direction. Preferably the base is stretched longitudinally before coating and transversely afterwards. Alternatively a layer of filler-containing plastics may be extruded onto a plastics film base to form a laminated base. Suitable plastics material for the sheet includes polymers and copolymers of ethylene, propylene and butene-1, polyamides, polyesters, homopolymers and copolymers of vinyl chloride or vinylidene chloride, homopolymers and copolymers of styrene. Fillers include clay, talc, asbestos, gypsum, BaSO 4 , CaCO 3 , TiO 2 , ZnO, MgO or diatomaceous earth (SiO 2 ). The dry-extensible polymer may be water soluble or insoluble. Suitable soluble polymers are homopolymers and copolymers (optionally partially hydrolysed) of acrylamide and its α- and/or N-substituted derivatives (e.g. methacrylamide, methylol acrylamide and methacrylamide), homopolymers and copolymers of alkyl acrylates and methacrylates (e.g. partially hydrolysed poly C 1-4  alkylacrylate), homopolymers and copolymers acrylic and methacrylic acids and there alkali metal and ammonium and amine salts, polymaleic acid, styrene/maleic acid copolymers, and partially hydrolysed homopolymers and copolymers of vinyl esters (e.g. vinyl acetate). Suitable insoluble polmers are polymers of the above monomers, ethylene/vinyl acetate copolymers, polyethylene wax, and one or two different C 1-8  alkyl acrylates. The base sheet may be made more receptive to the coating by pretreatment by corona discharge, flame or vacuum, and the coating may be applied by air-knife, sizing press, roll coater, electrostatically or by mist method. The coating, when dry, may be subject to corona discharge treatment.
Patent GB-1203097-A (GB)
Title: A process and apparatus for the manufacture of multi-ply bag-forming stock and bags therefrom
IPC: B31B50/80
Filed: 1968-03-29
Abstract: 1,203,097. Making bags. HOERNER WALDORF CORP. 29 March, 1968 [30 March, 1967], No. 15270/68. Addition to 1,149,363. Heading B5D. [Also in Division F2] Bags are manufactured from a gusseted, multi-ply bag-forming stock 16 which is made by advancing at least one web 11 of sheet material together with a preformed plastics tube 12 to a mandrel 21, 22, the plastics tube being inflated with gas. The web 11 or webs are skelped about the plastics tube and the composite tube so formed is gusseted as by gusset skids (Fig. 3, not shown) at each side thereof. During the advancement of the plastics tube more gas is introduced therein, to overcome leakage, by puncturing the tube and injecting the gas. In the construction shown the puncturing is effected by a hollow air needle assembly 35 mounted on a rotatable shaft 34 and urged to rotate therewith through a pair of springs 45 connected by brackets to the shaft. Although the needle penetrates the tube once every shaft revolution air is only supplied when sufficient gas has leaked out therefrom to actuate a switch 48 on arm 49 of which engages the composite tube in the region of a gap in the top plates 21 of the mandrel. Gas only passes to the needle during a small arc of its travel, this being effected by a cam on the shaft 34. The bag-forming stock is punctured in a position which, in the finished bag, lies between the bag seal and the end of the bag.